Debian 5 security issue

In running sybaptic, to check for available system updates, I
encountered the following message, and it is not the first time that I
have encountered the message.

"Granted permissions without asking for password

The '/usr/sbin/synaptic' program was started with the privileges of the
root user without the need to ask for a password, due to your system's
authentication mechanism setup.

It is possible that you are being allowed to run specific programs as
user root without the need for a password, or that the password is
cached.

This is not a problem report; it's simply a notification to make sure
you are aware of this."

I have not knowingly configured the system to institute this system
security breach.

How do I eliminate this system security breach?

Thank you in anticipation.

--
Bret Busby
Armadale
West Australia
..............

"So once you do know what the question actually is,
you'll know what the answer means."
- Deep Thought,
Chapter 28 of Book 1 of
"The Hitchhiker's Guide to the Galaxy:
A Trilogy In Four Parts",
written by Douglas Adams,
published by Pan Books, 1992